z2m always restarting due to loss of MQTT connection

[eigenphase]

I am running both mosquitto and zigbee2mqtt as Home Assistant addon ("app"). This has been running flawlessly for many years.

Now randomly I notice z2m is permanently restarting every so often. This is what I see when this happens:

[2026-04-10 20:23:17] info: 	z2m: Stopping Zigbee2MQTT (restart=false, code=0, signal=SIGTERM)
[2026-04-10 20:23:17] info: 	z2m:mqtt: MQTT publish: topic 'zigbee2mqtt/bridge/state', payload '{"state":"offline"}'
[2026-04-10 20:23:17] info: 	z2m: Disconnecting from MQTT server
[2026-04-10 20:23:17] info: 	z2m: Stopping zigbee-herdsman...
[2026-04-10 20:23:17] error: 	z2m: Not connected to MQTT server!
[2026-04-10 20:23:17] error: 	z2m: Cannot send message: topic: 'zigbee2mqtt/sw_inovelli_laundryrm', payload: 

However, everthing on mosquotto side (same HA instance!) seems to be fine. The only thing I see is:

2026-04-10 20:23:17: Client mqttjs_d2f3e269 disconnected.

Is there any explanation for this?
How to fix it?

[ecto1a2003]

8m seeing much the same here. Its introduced random latency to my environment as well